EDIT

/**

 * Copyright (C) 2007 EDIT

 * European Distributed Institute of Taxonomy

 * http://www.e-taxonomy.eu

 *

 * The contents of this file are subject to the Mozilla Public License Version 1.1

 * See LICENSE.TXT at the top of this package for the full license terms.

 */

package eu.etaxonomy.taxeditor.preference;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Map.Entry;

import org.apache.commons.lang.StringUtils;

import org.eclipse.swt.SWT;

import org.eclipse.swt.custom.CLabel;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Combo;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import eu.etaxonomy.cdm.api.application.ICdmRepository;

import eu.etaxonomy.cdm.api.service.IPreferenceService;

import eu.etaxonomy.cdm.model.metadata.CdmPreference;

import eu.etaxonomy.cdm.model.metadata.CdmPreference.PrefKey;

import eu.etaxonomy.cdm.model.metadata.PreferencePredicate;

import eu.etaxonomy.cdm.model.metadata.PreferenceSubject;

import eu.etaxonomy.cdm.model.name.NomenclaturalCode;

import eu.etaxonomy.taxeditor.databaseAdmin.preferencePage.IE4AdminPreferencePage;

import eu.etaxonomy.taxeditor.l10n.Messages;

import eu.etaxonomy.taxeditor.model.NomenclaturalCodeHelper;

import eu.etaxonomy.taxeditor.preference.menu.CdmPreferencePage;

import eu.etaxonomy.taxeditor.store.CdmStore;

/**

 * <p>

 * NomenclaturalCodePreferences class.

 * </p>

 *

 * @author k.luther

 * @created 14.09.2018

 */

public class NomenclaturalCodePreferences extends CdmPreferencePage implements IE4AdminPreferencePage{

    protected CdmPreference pref;

    protected NomenclaturalCode actualCode = null;

    protected Map<NomenclaturalCode, String>  labelAndValues;

    protected Map<NomenclaturalCode, Integer> keyAndIndex;

    protected Combo nomenclaturalCode;

    protected Button allowOverrideButton;

    protected boolean allowOverride;

    private boolean override;

	@Override

	protected Control createContents(Composite parent) {

//	    PreferencesUtil.setPreferredNomenclaturalCode(null, false);

	    getValues();

	    Composite composite = createComposite(parent);

	    if (pref != null && !pref.isAllowOverride() && !isAdminPreference){

	        final CLabel description = new CLabel(composite, SWT.NULL);

	        description.setText(Messages.NomenclaturalCodePreferences_localChangesNotAllowed);

	        description.setLayoutData(createTextGridData());

	        return composite;

	    }

        final CLabel description = new CLabel(composite, SWT.NULL);

        description.setText(Messages.NomenclaturalCodePreferences_description);

        description.setLayoutData(createTextGridData());

        nomenclaturalCode= new Combo(composite, SWT.READ_ONLY);

        nomenclaturalCode.setText(Messages.NomenclaturalCodePreferences_available_codes);

        nomenclaturalCode.setFont(parent.getFont());

        getLabelAndValues();

        keyAndIndex = new HashMap<>();

        Integer index = 0;

        if (isAdminPreference){

            nomenclaturalCode.add(Messages.Preference_Use_Default + " (" +PreferencePredicate.NomenclaturalCode.getDefaultValue().toString()+")", index);

        }else{

            if (pref != null){

                nomenclaturalCode.add(Messages.Preference_Use_Default + " (" +pref.getValue()+")", index);

            }

        }

        index++;

        for (NomenclaturalCode key: labelAndValues.keySet()) {

            nomenclaturalCode.add(labelAndValues.get(key));

            keyAndIndex.put(key, index);

            index++;

        }

        index = keyAndIndex.get(actualCode);

        if(index!=null){

            nomenclaturalCode.select(index);

        }else{

            nomenclaturalCode.select(0);

        }

        if (isAdminPreference){

            allowOverrideButton = createAllowOverrideButton(composite);

            allowOverrideButton.setText(Messages.GeneralPreference_allowOverride);

            allowOverrideButton.setSelection(allowOverride);

            if (actualCode == null){

                allowOverrideButton.setEnabled(false);

            }

            allowOverrideButton.addSelectionListener(new SelectionAdapter(){

                @Override

                public void widgetSelected(SelectionEvent e) {

                    allowOverride = allowOverrideButton.getSelection();

                    setApply(true);

                }

            });

        }

        nomenclaturalCode.addSelectionListener(new SelectionAdapter() {

            @Override

            public void widgetSelected(SelectionEvent evt) {

                setApply(true);

                String name = nomenclaturalCode.getText();

                actualCode = null;

                for (Entry<NomenclaturalCode, String> label:labelAndValues.entrySet()){

                    if (label.getValue().equals(name)){

                        actualCode = label.getKey();

                    }

                }

                if (isAdminPreference){

                    allowOverrideButton.setEnabled(actualCode != null);

                    //if default value is selected, allow override is true

                    allowOverrideButton.setSelection(allowOverride  || (actualCode == null));

                }

            }

        });

        return composite;

	}

	/**

	 * @return

	 */

	private Map<NomenclaturalCode, String> getLabelAndValues() {

		List<NomenclaturalCode> supportedCodes = NomenclaturalCodeHelper

				.getSupportedCodes();

		labelAndValues = new HashMap<>();

		for (int i = 0; i < supportedCodes.size(); i++) {

			labelAndValues.put(supportedCodes.get(i), NomenclaturalCodeHelper

                    .getDescription(supportedCodes.get(i))) ;

		}

		return labelAndValues;

	}

	/**

	 * {@inheritDoc}

	 *

	 * Initialize the preference page

	 */

    @Override

    public void init() {

        super.init();

        if(!CdmStore.isActive()){

            return;

        }

	}

	@Override

	 public boolean performOk() {

	    if (!isApply()){

            return true;

        }

	    if (actualCode != null && pref.isAllowOverride()){

	        PreferencesUtil.setStringValue(PreferencePredicate.NomenclaturalCode.getKey(), actualCode.getKey());

	        PreferencesUtil.setBooleanValue(PreferencesUtil.createOverridePreferenceString(PreferencePredicate.NomenclaturalCode.getKey()), true);

	    }else{

	        PreferencesUtil.setBooleanValue(PreferencesUtil.createOverridePreferenceString(PreferencePredicate.NomenclaturalCode.getKey()), false);

	    }

        return true;

    }

	@Override

	protected void performDefaults() {

	    actualCode = null;

	    allowOverride = true;

	    nomenclaturalCode.select(0);

        if (isAdminPreference){

            allowOverrideButton.setSelection(allowOverride);

            allowOverrideButton.setEnabled(false);

        }

        setApply(true);

	    super.performDefaults();

	}

	@Override

    protected void getValues(){

	    isAdminPreference = false;

	    ICdmRepository controller = CdmStore.getCurrentApplicationConfiguration();

        if (controller != null){

            IPreferenceService service = controller.getPreferenceService();

            PrefKey key = CdmPreference.NewKey(PreferenceSubject.NewDatabaseInstance(), PreferencePredicate.NomenclaturalCode);

            pref = service.find(key);

            if (pref != null){

                allowOverride = pref.isAllowOverride();

            }else{

                allowOverride = true;

            }

        }

        String stringValue = PreferencesUtil.getStringValue(PreferencePredicate.NomenclaturalCode.getKey(), true);

        Boolean overridePref = PreferencesUtil.getBooleanValue(PreferencesUtil.createOverridePreferenceString(PreferencePredicate.NomenclaturalCode.getKey()), true);

        override = overridePref != null? overridePref:false;

        if (!StringUtils.isBlank(stringValue) && override){

            actualCode = NomenclaturalCode.fromString(stringValue);

        }else{

            actualCode = null;

        }

	}

}